1 Samuel 26:10-12

10 David said furthermore, [As] the LORD lives, if the LORD does not smite him or his day comes to die or he descends into battle and perishes,

11 the LORD forbid that I should stretch forth my hand against the LORD'S anointed; but, I pray thee, take thou now the spear that [is] at his head and the cruse of water and let us go.

12 So David took the spear and the cruse of water that were at Saul's head, and they went, and no one saw [it] nor knew [it] neither awaked, for they [were] all asleep because a deep sleep from the LORD had fallen upon them.